Chuck for jig saws or the like



Feb. 21, 1956 M. J. KARR caucx FOR JIG SAWS OR THE LIKE Filed Oct. 26,1951 INVENTOR.

United States Patent Ofiice 2,735,685 CHUCK FOR JIG SAWS OR THE LIKEMichael Joseph Karr, Kalamazoo, Mich., assignor to Atlas Press Company,Kalamazoo, Mich., a corporation of Michigan Application October 26,1951, Serial No. 253,355 4 Claims. 01. 279-44 This invention relates tochucks for jig saws or the like.

Heretofore various means have been provided for indexing the saw blade90. Many of such means have been complicated and expensive.

One of the objects of this invention is to provide a chuck in whichadjustment may be easily and simply made.

Another object is to provide such a chuck which is inexpensive and canbe placed on low-priced saws or the like.

versal and may be used for chucking either saws or files withoutexpensive adjustment.

Other objects and advantages of the invention will be apparent from thefollowing specification and the accompanying drawings, in which:

Fig. 1 is a perspective view of one form of the improved chuck with asaw blade chucked therein;

Fig. 2 is a similar view of the chuck shown in Fig. 1 with a filechucked therein;

.Fig. 3 is a view showing the parts of the chuck in its assembledrelationship;

Fig. 4 is an elevational view of another form of the invention;

Fig. 5 is a bottom plan view of the form of chuck shown in Fig. 4;

Fig. 6 is a detailed sectional view taken on the line 66 of Fig. 4, and

Fig. 7 is a detailed sectional view taken on the line 7-7 of Fig. 5.

The chuck shown in Figs. 1-3 consists of a chuck body 1 which isgenerally cylindrical in form. It is provided with alongitudinally-extending notch 2 which is formed by substantiallyradially-extending walls 3 and 4 which exing walls 6 and 7 at rightangles thereto. This jaw, when assembled with the chuck body, fits inthe notch 2 substantially forming a cylinder. The shank 8 serves toattach the chuck to a reciprocating plunger which is not shown.

may be chucked between the jaw 5 and the wall 4 to give 90 adjustment tothe blade.

Diametrically opposite the notch 2 is a notch 15. A screw 16 is screwthreaded in the aperture 17 in the ring to serve to chuck a file orsimilar tool 18 as shown in Fig. 2, the V walls of the notch 15 servingto clamp the file in substantially central position.

r 2,735,685 Patented Feb. 21, 1956 The jaw 5 may be retained within thering and in clamping position by various means. The means shown consistof a circumferential groove 19 surrounding the chuck. A pin 20 extendingthrough the aperture 21 in the ring fits In this form of invention inorder to chuck a file it is necessary to remove the cup 109 fromposition. The cup is merely retained by the ball 110 seated in the notch111 is then replaced and a file is placed in the notch 102 where it isclamped by the screw 113.

The chucks shown and described above may be made very inexpensively.They give adjustment for a saw as above described in a most inexpensivemanner. No other adjusting mechanism is necessary; thus greatly reducingthe overall cost of a saw equipped with such a chuck.

Preferred forms of the invention have been shown and described. However,they have been shown and described merely by way of illustration andwithout any intention of limiting the invention to the specific formshown and described.

I claim:

1. In a machine tool the combination of a cylindrical chuck body havinga longitudinally-extending notch therein formed by substantiallyradially-extending walls at 90 to one another, a chuck jaw comprising acylindrical segment having a pair of flat walls at 90 to one another,which, with said chuck body, substantially forms a cylinder, a ringsurrounding said chuck body and jaw, a screw and the other flat sideengaging one of the walls of said chuck jaw, said saw being shiftable onunclamping to engage the other wall of said notch for 90 adjustment ofits cutting edge and means for retaining said chuck jaw within saidring.

2. In a machine tool the combination of a chuck body having alongitudinally-extending notch therein formed by walls at 90 to oneanother and extending from substantially the center of the chuck body tothe periphery thereof, a V-shaped chuck jaw having walls at 90 to oneanother and fitting in said notch, means for forcing said jaw intoclamping engagement in said notch a saw clamped in The shank 108 isprovided for attaching the and the other flat side engaging one of thewalls of said chuck jaw, said saw being shiftable on unclamping toengage the other wall of said notch for 90 adjustment of its cuttingedge.

3. In a machine tool the combination of a chuck body having alongitudinally-extending notch therein formed by walls at 90 to oneanother and extending from substantially the center of the chuck body tothe periphery thereof, a retainer surrounding said chuck body, a V-shaped chuck jaw having walls at 90 to one another and fitting in saidnotch, a screw threaded in said retainer and bearing on said jaw toforce it into clamping engagement in said notch a saw clamped in saidnotch and having flat sides and a cutting edge, one flat side lyingagainst one of the said walls of said notch and the other fiat sideengagin g one of the walls of said chuck jaw, said saw being shiftableon unclamping to engage the other wall of said notch for 90 adjustmentof its cutting edge and means for retaining said chuck jaw within saidretainer and means for retaining said retainer in position around saidchuck aw.

4. In a machine toolthe combination of a chuck body having alongitudinally-extending notch therein formed by walls at 90 to oneanother and extending from substantially the center of the chuck body tothe periphery thereof, a V-shaped chuck jaw having walls at 90 to oneanother and fitting in said notch, a retaining cup surrounding saidchuck body and jaw, means for forcing said jaw into clamping engagementin said notch a saw clamped in said notch and having flat sides and acutting edge, one flat side lying against one of the said walls of saidnotch and the other fiat side engaging one of the walls of said chuckjaw, said saw being shiftable on unclamping to engage the other wall ofsaid notch for 90 adjustment of its cutting edge, said cup havinganaperture in register with said chuck body and jaw but being of a size toengage said body and jaw and retain said jaw in position in said notchand means for retaining said cup on said body.

References Cited in the file of this patent UNITED STATES PATENTS 35,391Richards May 27, 1862 908,804 Rhoades Jan. 5, 1909 1,969,827 Tautz Aug.14, 1934 1,984,500 Tautz Dec. 18, 1934 2,286,530 Forden June 16, 19422,355,286 Pink Aug. 8,- 1944 2,472,040 Brookfield May 31, 1949

